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Properties and the Use of Metal Foams
Křivánek, Robin ; Liškutín, Petr (referee) ; Němec, Karel (advisor)
In this thesis are summarized the findings of metal foams, with prevailing constraints on aluminum foam, because in them hides the greatest potential. The first part is described the production of porous materials, especially the way of floam production by thermal decomposition of floaming agent and melt gas injection. There are also written stress tests to gain a deeper knowledge of their properties, but also the latest exploring methods of foams, such as using a radioscopiy and CT scanner from which then creates a voxel model of foam. They are summarized here the basic ways of processing. Finally we must mention the possibility of using these materials with a focus on commercially produced foams Alporas® and Duocel®. Mass using foams mainly prevents high production costs and in some cases difficult reproducibility of properties.
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Mechanical properties of titanium alloys
Prudíková, Alena ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
This bachelor thesis was created in a form of literary search and it summarizes the basic information of Titanium and its alloys. The most significant features, such as its position in Periodic Table of the Elements, allotropic modifications and their crystal lattices, chemical or physical qualities, are mentioned in the first chapters. The attention was also paid to both the mechanical and the technological qualities of titanium as such, including the effect of impurities that may be very significant. General and summarized information about the history of titanium, as well as current directions in the development of its alloys are discussed in chapter 1.3. As a following, the information about production and the methods used during the production are discussed in chapter 2. Distinct part of the thesis depicts the partition of concrete titanium alloys and the heat treatment of them. The TiAl6V4 alloy was described in details, since it is the most widely used, therefore the most often produced titanium alloy.
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Low cycle fatigue of EN-AW 7075 aluminium alloy
Bártková, Denisa ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
The main goal of this bachelor thesis is analysis of low-cycle fatigue of wrought alluminium alloy EN-AW 7075. In theoretical part of thesis, current facts about alluminium alloys and fatigue behaviour of material are summarized. Practical part contains evaluation of tension tests and analysis of experiments in low-cycle fatigue region. In additional, the microstructure of an alloy was observed.
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The Use of the Aluminium Alloy in the Bicycle Industry
Hudec, Jiří ; Liškutín, Petr (referee) ; Liškutín, Petr (referee) ; Němec, Karel (advisor)
Bachelor's thesis deals with the aluminum alloys in the cycling industry. It contains information on the properties of aluminum and its alloys and the distribution of aluminum alloys according to certain criteria. It is discussed in more detail in the work of most alloys in the cycling industry - Al-Cu-Mg, Al-Mg-Si, Al-Mg-Zn and Al-Zn-Mg-Cu with examples, for which components are suitable alloys. Everything is accompanied by images in the enclosure at the end of work.
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Application of magnesium alloys castings
Pernica, Vítězslav ; Liškutín, Petr (referee) ; Roučka, Jaromír (advisor)
Magnesium alloys are still idle in technical applications because of their properties. The history of metal is not very old, the first application of its alloy started on the beginning of the 20th century. Magnesium is very light. Its weight is about one third less than the weight of aluminum and it is the third most frequented structural metal. However its preparation and processing can be problematical because magnesium has high affinity to oxygen. It causes intensive burning. During the century of stature have been improved both production and alloys. The usage of magnesium alloys took more importance and it is the most used alloy in automotive field sofar. Recently its demand expands mainly in electrotechnics. Next usage we can find in aeronautics, energetics, military and many other branches.
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Influence of Homogenizing on Mechanical Properties of AZ91 Alloy
Provazníková, Andrea ; Liškutín, Petr (referee) ; Věchet, Stanislav (advisor)
This bachelor thesis includes photos and graphic representations of the influence of heat treatment on the mechanical properties of magnesium alloy AZ91. The structures of the alloy are recorded on the light microscopy pictures as well as photographs taken using a scanning microscope of fracture areas in the material. Results of a Tensile Test determining the strength and plastic properties and measuring of hardness and microhardness of the material are also included.
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